Domains with DNS TXT v=spf1 mx include:penton.com include:mxlogic.net ~all include:_netblocks.mimecast.com

There are 3 domains that have DNS TXT set to v=spf1 mx include:penton.com include:mxlogic.net ~all include:_netblocks.mimecast.com. The top 3 records ordered by domain rank are listed below.

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